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| 1 | Fluidization behavior and reducibility of iron ore fines during hydrogen-induced fluidized bed reduction显示文摘A laboratory fluidized bed reactor was used to investigate the fluidization behavior and reducibility of various iron ore fines.Hydrogen was chosen as a reducing agent across a temperature range of 873-1073 K.The magnetite ore used exhibited strong sticking behavior after the initiation of metallic iron formation.All other tested ores fluidized sufficiently well when subjected to the same high reduction temperatures.Parallel kinetic analysis was conducted using a previously developed model to include three rate-limiting step types.The trend of apparent activation energy was correlated with the degree of reduction.Additionally,the influence of varying the specific gas rate was investigated.The results show the variation in reducibility as a result of different interactions,which influence the rate-limiting mechanisms of nucleation and the undertaken chemical reactions,which vary as a function of temperature and degree of conversion.The apparent activation energies,determined from the reduction of wtistite to metallic iron,were in the range of 15-60 kJ/mol,depending on the iron ore used and the degree of conversion.The change in apparent activation energy deriving from the increased specific gas rate can be explained by an increasing nucleation effect,especially at lower reduction temperatures. | Daniel Spreitzer Johannes Schenk | 2020 | Particuology2020，18，5： | 2 |
| 2 | Do you want to participate in a clinical study as a healthy control?-Risk or benefit?显示文摘A healthy woman volunteered to participate as 'healthy control' in a study.An increased level of procalcitonin(PCT) was detected and remained elevated on follow-up measurements.As calcitonin levels were elevated as well,thyroid ultrasound was performed which revealed nodes in both thyroid lobes,one of them showing metabolic activity in positron emission tomography-computed tomography scan.To exclude a malignant thyroid cancer despite the negative findings in a fine needle aspiration the patient underwent thyroidectomy and a medullary thyroid carcinoma(MTC) was detected in the right lobe.MTC is a rare endocrine tumor with a poor prognosis once having spread,therefore early detection remains a priority for the outcome.Screening parameter is serum calcitonin,in absence of infection the pro-hormone PCT can be used as a screening parameter as well with high sensitivity. | Hanna Giessen Christian A Nebiker Matthias Bruehlmeier Stefan Spreitzer Beat Mueller Philipp Schuetz | 2017 | World Journal of Clinical Cases2017，5，12： | 2 |
| 3 | Involvement in sports and psychological well-being显示文摘 | Snyder E E Spreitzer E A | 1974 | International Journal of Sport Psychology1974，，5： | 1 |
| 4 | Solid-state dye-sensitized mesoporous TiO2 solar cells with high photon-to-electron conversion efficiencies显示文摘 | Bach U Lupo D Comte P Moser J E Weiss(o)rtel F Salbeck J Spreitzer H Gr(a)tzel M | | 0，，： | 1 |
| 5 | Rubisco: Structure, regulatory interactions, and possibilities for a better enzyme 显示文摘 | Spreitzer R Salvucci M | 2002 | Annu Rev Plant Biol2002，53，： | 1 |
| 6 | Psychological empowerment in the work place: construct definition, measurement and validation 显示文摘 | Spreitzer G M | 1995 | Academy of Management Journal1995，38，： | 1 |
| 7 | Psychological empowerment in the work- place: dimensions, measurement, and validation 显示文摘 | Spreitzer G M | 1995 | Academy of Management Journal1995，38，： | 1 |
| 8 | A socially embedded model of thriving at work 显示文摘 | SPREITZER G SUTCLIFFE K DUTTON J | 2005 | Organization Science2005，16，5： | 1 |
| 9 | Providing Location Information in a Ubiquitous Computing Environment (Panel Session)显示文摘 | Mike Spreitzer Marvin Theimer | 1993 | ACM SIGOPS Operating Systems Review1993，，12： | 1 |
| 10 | Performance management for cluster based Web services显示文摘 | PACIFICI G SPREITZER M TANTAWI A | 2005 | IEEE Journal on Selected Areas in Communications2005，23，12： | 1 |
| 11 | Social structural characteristics of psychological empowerment显示文摘 | Spreitzer G M | 1996 | Academy of Management Journal1996，39，2： | 1 |
| 12 | Psychological ernpowerment in the work place: Dimensions,measurement and validation显示文摘 | Spreitzer G M | 1995 | Academy of Management Journal1995，38，5： | 1 |
| 13 | Social structural characteristics of psychological empowerment显示文摘 | Spreitzer G M | 1996 | Academy of Management Journal1996，39，： | 1 |
| 14 | Rubisco: structure, regulatory interac- tions, and possibilities for a better enzyme 显示文摘 | Spreitzer R J Salvucci M E | 2002 | Annual Rev Plant Biol2002，53，1： | 1 |
| 15 | Role of the snrall subunit ill ribulose - 1, 5 - bisphosphate carboxylase/oxygenase 显示文摘 | Spreitzer R J | 2003 | Archives of Biochemistry and Biophysics2003，414，2： | 1 |
| 16 | Psychological empowennent in the workplace:Dimensions,measurement,and validation显示文摘 | Spreitzer G.M | | 0，，05： | 1 |
| 17 | Social structural characteristics of psychological empowerment显示文摘 | SPREITZER G M | 1996 | Academy of Management Journal1996，39，2： | 1 |
| 18 | Enhanced dielectric and electrocaloric properties in lead-free rod-like BCZT ceramics显示文摘Ba0.85Ca0.15Zr0.10Ti0.90O3(BCZT)lead-free ceramics demonstrated excellent dielectric,ferroelectric,and piezoelectric properties at the morphotropic phase boundary(MPB).So far,to study the effect of morphological changes on dielectric and ferroelectric properties in lead-free BCZT ceramics,researchers have mostly focused on the influence of spherical grain shape change.In this study,BCZT ceramics with rod-like grains and aspect ratio of about 10 were synthesized by surfactant-assisted solvothermal route.X-ray diffraction(XRD)and selected area electron diffraction(SAED)performed at room temperature confirm the crystallization of pure perovskite with tetragonal symmetry.Scanning electron microscopy(SEM)image showed that BCZT ceramics have kept the 1D rod-like grains with an average aspect ratio of about 4.Rod-like BCZT ceramics exhibit enhanced dielectric ferroelectric(εr=11,906,tanδ=0.014,Pr=6.01μC/cm^2,and Ec=2.46 kV/cm),and electrocaloric properties(ΔT=0.492 K andz=0.289(K×mm)/kV at 17 kV/cm)with respect to spherical BCZT ceramics.Therefore,rod-like BCZT lead-free ceramics have good potential to be used in solid-state refrigeration technology. | Zouhair HANANI Soukaina MERSELMIZ Abdelaadim DANINE Nicolas STEIN Daoud MEZZANE M’barek AMJOUD Mohammed LAHCINI Yaovi GAGOU Matjaz SPREITZER Damjan VENGUST Zdravko KUTNJAK Mimoun El MARSSI Igor ALUK'YANCHUK Mohamed GOUNE | 2020 | Journal of Advanced Ceramics2020，9，2： | 1 |
| 19 | Toward the Construct Definition of Positive Devianee显示文摘 | Spreitzer G M Sonenshein S | 2004 | American Behavioral Scientist2004，47，： | 1 |
| 20 | Social structural characteristics of psychologi- cal empowerment 显示文摘 | Spreitzer G M | 1996 | Academy of Management Journal1996，39，2： | 1 |
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